Malicious PDF — malware analysis report

Static analysis result for SHA-256 758ce64f92702e92…

MALICIOUS

PDF

80.6 KB Created: 2021-04-07 07:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bd4c8a88513cc905b6be5b46c9484959 SHA-1: 171d9f524abf126f69a121411ab9b488184afa91 SHA-256: 758ce64f92702e92c90098b8a544352159ad02d95c0b4b1e92639107c1acaa79
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution campaign. The presence of a large number of external links, many pointing to other PDF files, suggests a link farm designed to obscure the ultimate malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/wix?keyword=showbox+hindi+movies+apk PDF link annotation
    • https://cdn.sqhk.co/pijajawopoji/iBiadFI/sapolewasiwemelobikasoru.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/f6jhh9Z/amazon_kindle_bookshelf.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/hfqhkJW/78927022082.pdfIn PDF document text
    • http://fovorowo.22web.org/buddha_story_in_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/9hghji3/truck_wallpaper_android_hd_joker.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/igfhdTn/fapujimesojikibavil.pdfIn PDF document text
    • http://ditevaxasazel.22web.org/vedumukuwas.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/ib8kiYC/63421033853.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/v2je3rD/23056164155.pdfIn PDF document text
    • https://cdn.sqhk.co/zewesifadeka/TCgjggo/police_car_drives_into_protesters_new_york.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d758dc5-56fc-4c89-a136-6c835dcc257d/34840801350.pdfIn PDF document text
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_e01d89f08d9345858a935df4bfc68817.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9d6ec7-7a32-4844-a5dd-e8411e0e0328/the_lion_the_witch_and_the_wardrobe_samizdat.pdfIn PDF document text
    • https://3557a179-a1ee-4801-a209-85ad6f504536.filesusr.com/ugd/9c409a_bcbf1237b8024996af353c7cefee2443.pdf?index=trueIn PDF document text
    • http://fenetidataj.rf.gd/abhimanyudu_movie_villain_bgm.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 5596 bytes
SHA-256: 6d798224bf82043a34491e032a7a3e736231d755cacef8268d6d5f6a0aafb993
font_01_sfnt_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 11244 bytes
SHA-256: 725e22f6dc78cc5dd031b125daaf5f0df444824c939bd784c49ce937641f847f

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